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PUBLISHED

CVE-2022-48637

bnxt: prevent skb UAF after handing over to PTP worker

Reserved:2024-02-25
Published:2024-04-28
Updated:2024-06-07

Description

In the Linux kernel, the following vulnerability has been resolved: bnxt: prevent skb UAF after handing over to PTP worker When reading the timestamp is required bnxt_tx_int() hands over the ownership of the completed skb to the PTP worker. The skb should not be used afterwards, as the worker may run before the rest of our code and free the skb, leading to a use-after-free. Since dev_kfree_skb_any() accepts NULL make the loss of ownership more obvious and set skb to NULL.

Product status

Default status
unaffected

83bb623c968e before 08483e4c0c83
affected

83bb623c968e before 32afa1f23e42
affected

83bb623c968e before c31f26c8f69f
affected

Default status
affected

5.14
affected

Any version before 5.14
unaffected

5.15.71
unaffected

5.19.12
unaffected

6.0
unaffected

References

https://git.kernel.org/stable/c/08483e4c0c83b221b8891434a04cec405dee94a6

https://git.kernel.org/stable/c/32afa1f23e42cc635ccf4c39f24514d03d1e8338

https://git.kernel.org/stable/c/c31f26c8f69f776759cbbdfb38e40ea91aa0dd65

cve.org CVE-2022-48637

nvd.nist.gov CVE-2022-48637

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